import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)

const router = new Router({
  routes: [
    {
      path:'/',
      redirect:'/login'
    },
    {
      path:'/login',
      component: () => import('@/views/user/Login')
    },
    {
      path:'/index',
      component: () => import('@/views/user/index')
    }
  ]
})

//挂载路由导航守卫
router.beforeEach((to,from,next) => {
  //to将要访问的路径
  //from代表从哪个路径跳转而来
  //next是一个函数，表示放行
  //next()放行   next('/login') 强制跳转

  if (to.path=='/login') return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token');
  if (!tokenStr) return next('/login');
  next();
})

export default router;
